Alternatives to Chlorpyriphos for Tobacco Growers

— Written By Hannah Burrack
en Español / em Português

El inglés es el idioma de control de esta página. En la medida en que haya algún conflicto entre la traducción al inglés y la traducción, el inglés prevalece.

Al hacer clic en el enlace de traducción se activa un servicio de traducción gratuito para convertir la página al español. Al igual que con cualquier traducción por Internet, la conversión no es sensible al contexto y puede que no traduzca el texto en su significado original. NC State Extension no garantiza la exactitud del texto traducido. Por favor, tenga en cuenta que algunas aplicaciones y/o servicios pueden no funcionar como se espera cuando se traducen.


Inglês é o idioma de controle desta página. Na medida que haja algum conflito entre o texto original em Inglês e a tradução, o Inglês prevalece.

Ao clicar no link de tradução, um serviço gratuito de tradução será ativado para converter a página para o Português. Como em qualquer tradução pela internet, a conversão não é sensivel ao contexto e pode não ocorrer a tradução para o significado orginal. O serviço de Extensão da Carolina do Norte (NC State Extension) não garante a exatidão do texto traduzido. Por favor, observe que algumas funções ou serviços podem não funcionar como esperado após a tradução.


English is the controlling language of this page. To the extent there is any conflict between the English text and the translation, English controls.

Clicking on the translation link activates a free translation service to convert the page to Spanish. As with any Internet translation, the conversion is not context-sensitive and may not translate the text to its original meaning. NC State Extension does not guarantee the accuracy of the translated text. Please note that some applications and/or services may not function as expected when translated.

Collapse ▲

Chlorpyriphos is an organophosphate insecticide that has been the topic of recent regulatory review. The federal Environmental Protection Agency decided not to revoke chlorpyriphos tolerances in 2019 which would have effectively banned its use. Despite this, some tobacco purchasers have indicated that they will not buy crop treated with chlorpyriphos.

Because of this, growers have contacted us asking for guidance on alternatives to chlorpyriphos. Fortunately this is a fairly easy question to answer, because in almost all NC tobacco fields, chlorpyriphos use is not necessary.

Chlorpyriphos (labeled as Lorsban Advanced, Warhawk and others) can only be applied pre transplant in tobacco, and these applications have typically been targeted at soil pests such as wireworm and white fringed beetle or cutworms.

For soil pests, greenhouse applications of imidacloprid (Admire Pro and others) can be made at the maximum labeled rate, which will provide similar suppression of wireworms as chlorpyriphos.

Cutworms rarely reach damaging numbers in NC tobacco fields, so a preventative treatment of chlorpyriphos targeting them is almost never warranted. Instead, growers with a history of cutworm damage should scout those fields weekly the first four weeks after transplant and take management action if clipped plants approach 10% loss. Foliar applications of lambda-cyhalothrin, bifenthrin, or other caterpillar materials are all good options during this period but should only be used if insects are directly observed.